Hey there!
This question is about finding and combining like terms.
Like terms are essentially terms with the same variable. This means that out like terms are 2x, 2x, 2x, and 4x.
Therefore, we have:
x(2+2+2+4) = x(10) = 10x
Another way to do this is to just add the coefficients to get 10x.
Remeber we're subtracting four too, so our answer is:
10x - 4
Hope this helps!